Subtract 21/56 from 72/30
1st number: 2 12/30, 2nd number: 21/56
72/30 - 21/56 is 81/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 30 × 28 = 840,
72/30 = 72 × 28/30 × 28 = 2016/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
21/56 = 21 × 15/56 × 15 = 315/840 - Subtract the two like fractions:
2016/840 - 315/840 = 2016 - 315/840 = 1701/840 - After reducing the fraction, the answer is 81/40
- In mixed form: 21/40
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